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|Type:||Artigo de periódico|
|Title:||INFRARED STUDY OF HYDROGEN CONCENTRATION IN BRAZILIAN QUARTZ|
|Abstract:||Infrared transmission spectroscopy is used to determine the amount of hydrogen in several kinds of Brazilian alpha-quartz. The experiments on the crystallographically oriented samples were used for the first time to verify the applicability of Paterson's formula (M. S. Paterson, Bull. Mineral. 105, 20, 1982) using the appropriate orientational factors for polarized and unpolarized radiations. The use of crystallographically oriented samples also allowed us to determine the average preferential direction of the OH dipoles which make an angle of 71-degrees with respect to the optic axis. The hydrogen concentration in the lst-quality layer of Brazilian quartz was found to be blow 70 ppm. (C) 1994 Academic Press, Inc.|
|Editor:||Academic Press Inc Jnl-comp Subscriptions|
|Appears in Collections:||Unicamp - Artigos e Outros Documentos|
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